A Win10 upgrade with persistent errors

Here’s how to prevent — or correct — problems caused by corrupted system files, after a Win10 upgrade.

Plus: How to upgrade a Win7 PC stuck in Safe Mode and how to easily add an Edge shortcut/icon — or almost any shortcut/icon — to your Win10 Desktop.

Faulty Win10 upgrade creates broken system files

Like many Windows Secrets readers, Kees is the de facto Windows-support tech for others, including one person whose Win10 upgrade resulted in scrambled system files and various malfunctions.

“A friend of mine did an upgrade from Windows 7 to Windows 10; and he was not happy with it. He was, for example, unable to connect to the Internet.

“I used SFC /scannow and found corrupt files. As always, my remedy was to do a nondestructive reinstall.

“Everything seemed to go well, and Internet access was restored. But when I did a second SFC /scannow, I again found corrupt files.

“I tried to locate the exact source of the error by examining the CBS [Component-Based Servicing] log file, but it’s huge. Do you know the best and fastest way to search this large file? How can I fix this problem?”

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